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Metals 2017, 7(8), 297; doi:10.3390/met7080297

Deformation Structure and Mechanical Properties of Pure Titanium Produced by Rotary-Die Equal-Channel Angular Pressing

1
College of Mechanics and Materials, Hohai University, Nanjing 211100, China
2
Jiangsu Maritime Institute, Nanjing 211100, China
3
Suqian Institute, Hohai University, Suqian 223800, China
*
Author to whom correspondence should be addressed.
Received: 25 June 2017 / Revised: 27 July 2017 / Accepted: 30 July 2017 / Published: 3 August 2017
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Abstract

Pure titanium was efficiently processed up to four passes at 420 °C by rotary-die equal-channel angular pressing (RD-ECAP). The deformation structure and mechanical properties of pure titanium with various RD-ECAP passes were subsequently investigated. Microstructure evolution revealed that plastic deformation was accommodated mainly by twins during the first and second passes, while the predominant deformation mechanism was dislocation slip during the third and fourth passes. { 10 1 ¯ 2 } twins were detected in the first pass, and { 10 1 ¯ 1 } twins occurred in the second pass of RD-ECAP. The ultimate tensile strength of pure titanium increased from 450 MPa in the as-received state to 627 MPa with a fracture elongation of 29% after four passes of RD-ECAP. View Full-Text
Keywords: pure titanium; rotary-die equal-channel angular pressing (RD-ECAP); microstructure; mechanical properties; deformation pure titanium; rotary-die equal-channel angular pressing (RD-ECAP); microstructure; mechanical properties; deformation
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Gu, Y.; Ma, A.; Jiang, J.; Yuan, Y.; Li, H. Deformation Structure and Mechanical Properties of Pure Titanium Produced by Rotary-Die Equal-Channel Angular Pressing. Metals 2017, 7, 297.

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